PRThreadType 编辑

The type of an NSPR thread, specified as a parameter to /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PR_CreateThread.

Syntax

#include <prthread.h>

typedef enum PRThreadType {
   PR_USER_THREAD,
   PR_SYSTEM_THREAD
} PRThreadType;

Enumerators

PR_USER_THREAD

/wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PR_Cleanup blocks until the last thread of type PR_USER_THREAD terminates.

PR_SYSTEM_THREAD

NSPR ignores threads of type PR_SYSTEM_THREAD when determining when a call to /wiki/en-US/docs/Mozilla/Projects/NSPR/Reference/PR_Cleanup should return.

Description

Threads can be either user threads or system threads. NSPR allows the client to synchronize the termination of all user threads and ignores those created as system threads. This arrangement implies that a system thread should not have volatile data that needs to be safely stored away. The applicability of system threads is somewhat dubious; therefore, they should be used with caution.